Nut-wrench.



C. A. KUHN NUT WRENCH.

APPLICATION FILED JULY 30,1913.

1 1 20,50 Patented Dec. 8, 1914.

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UMTED STATES PATENT OFFTCE.

CLARENCE ADELBERT KU I-IN, OF IRVINGTON, ALABAMA.

NUT-WRENCH.

Application filed July 30, 1913.

a citizen of the United States, residing at Irvington, in the county of Mobile and State of Alabama, have invented new and useful Improvements in Nut-lVrench'es, of which the following is a specification.

The present invention relates to improvements in nut wrenches; and the objects in view are to provide a wrench of cheap and simple construction, consisting of few easily assembled parts and which is capable of fine adjustment.

Other objects and advantages of the invention will appear in the following description and the novel features thereof will be particularly pointed out in the claim.

In the drawings there is illustrated a simple and approved reduction of the improvement to practice, and in which drawing:

Figure 1 is a side elevation of a wrench constructed in accordance with the present invention, the dotted lines illustrating the position of the worm screw carrying carriage when the sliding jaw is to be quickly adjusted with relation to the stationaryj aw, Fig. 2 is an enlarged central longitudinal sectional view through the jaws and stem, Fig. 3 is a similar view of the movable jaw and its pivoted carriage, Fig. 4: is a transverse sectional view on the line H of Fig. 3, Fig. 5 is a plan view of the spring, Fig. 6 is a side elevation illustrating a modified form of the slidable jaw, and Fig. 7 is a top plan view of the same.

The wrench includes a stationary jaw 1 having an angular shank 2 upon which is arranged a handle 3, the upper portion of the shank 2 upon the handle 3 being formed with a number of transversely arranged teeth 4 which terminate a suitable distance away from the head of the jaw 1.

The numeral 5 designates the movable jaw. The jaw 5 has its front face formed with an opening 6 which provides a passage whereby the jaw may be slidably arranged upon the shank 2. The rear portion of the jaw is preferably hollow and the wall thereof is straight. Associated with the jaw 5 is a carriage 7, the same comprising a shell, which includes lower wall 8, front and rear connecting walls 9 and 10 respectively, which are arranged a suitable distance away from the wall 8 to provide a passage for the shank 2 of the wrench, and the upper wall Specification of Letters Patent.

Patented Dec. 8, 1914.

Serial No. 782,041.

of the carriage is further provided with a transversely arran ed wall or partition 11 which is spaced a suitable distance from the rear wall 10. The walls 10 and 11 are provided. with longitudinally arranged registering openings 12 and 13 adapted to receive a pin 14 which forms an axle for a worm screw 15. The threads of the screw 15 are adapted to cooperate with the threads 4 of the handle. The front wall of the carriage is formed with outwardly projecting flanges 16 which enter the open rear face of the jaw 5 and which are pivotally connected to the sides of said jaw, as indicated by the numeral 17. The wall 9 has its outer face straight, so that when the carriage 7 is connected with the jaw 5, the said carriage provides a substantially right angular extension for the jaw, and the flanges 16 connecting with the opposite inner faces of the jaw to prevent a lateral or sliding movement of the carriage with relation to the jaw. The carriage 7, at the rear portion thereof, and in a plane with the upper surface of the wall 8 has its sides formed with substantially rectangular openings 18 which are adapted to receive the reduced rectangular ends 19 of a bowed spring 20. The central and bowed portion of the flat spring 20 exerts a tension between the lower edge of the shank 2 and the lower wall 8 of the carriage 7, so as to force the wall 9 as well as the flanges 16 into contact with the rear portion of the jaw 5, and as a consequence, the worm screw 15 engages with the threads 4. As shown by the dotted lines in Fig. l of the drawings, an upward pressure upon the wall 8 will swing the carriage 7 to bring the worm screw 15 out of engagement with the threads 4, and so permit of the jaw 5 being moved longitudinally upon the shank 2 with relation to the jaw 1.

From the above description, taken in connection with the accompanying drawing, the simplicity of the device as well as the advantages thereof will, it is thought, be perfectly apparent to those skilled in the art to which such inventions appertain without further detailed description.

In Figs. 6 and 7 there is illustrated a modified form of the slidable jaw. The jaw 5 comprises a hollow structure similar to the jaw 5, but has its sides, adjacent its rear face formed with vertically disposed grooves 50. The carriage 7' has its side wallextended beyond its wall 9, the said extending portions being indicated by the numerals 51, and each of the said extensions has its inner face provided throughout its length with a vertically disposed tongue 52 which is adapted to be received within the groove 51. By this means it will be noted that the carriage 7 may be slidably connected with the jaw 5, the remainder of the structure being substantially similar to that previously de scribed.

Having thus described the invention, what I claim is: i i

A wrench comprising a stationary jaw having a shank provided with transverse teeth, a slidable jaw upon the shank having an open rear portion, a hollow carriage arranged upon the shank and including a front wall and a rear wall, relatively spaced vertically disposed flanges-formed on the Copies of this patent may be obtained for I front wall of the carriage and extending therebeyond, said flanges being of a height equaling the height of the front wall of the carriage, means passing through the flanges and the walls of the slidable jaw for pivotally connecting the carriage with said jaw, means carried by the carriage for normally engaging the teeth of the shank, means carried by the carriage for exerting downward pressure on said jaw and adapted to force the former mentioned means into engagement with theteeth of the shank.

In testimony whereof I affix my signature in presence-of two witnesses.

CLARENCE ADELBERT KUHN.

Witnesses Martens A. G. GREEN, HELEN L. GREEN.

five cents ea'ch, by addressing the Commissioner of Patents,

Washington, D. C. 

